Part of set of 27 glass negatives and one celluloid negative depicting airplanes and aviators of Panama-Pacific International Exposition, San Francisco; Lockheed (Lougheed) Model G seen in flight over San Francisco Bay; military ship and Alcatraz Island in background; text on image reads “Loughead Passenger Carrying Hydro-Aeroplane / 22015”; photograph taken in 1915; handwritten inscription on original sleeve, “22440 / A. G. Hunt.”